On the morning of the first day of the week, thenceforth hallowed as the Lord's Day--the Christian Sabbath--the soul of Jesus left Hades, and once more and for ever entered the body, and formed with it the perfected humanity of the "Word made flesh." The resurrection of Jesus is a well-attested fact of history. The close-sealed, sentinelled sepulchre, the broken seal, the stone rolled away, the trembling guard, the empty tomb, and the many appearances of Jesus to the women, the disciples, the brethren, and last of all to Saul of Tarsus, prove that He had risen.[129] The Resurrection was a fulfilment of Old Testament prophecy. Peter thus interprets Psalm xvi. 10, "For thou wilt not leave my soul in hell; neither wilt thou suffer thine Holy One to see corruption," affirming that David in that Psalm speaks of the Resurrection of Christ.[130] Jesus Himself often foretold, both figuratively and directly, His own resurrection, as when He spoke of the coming destruction of the Temple, and connected it with the death and resurrection of His body;[131] or when He told the disciples that in a little while they should not see Him, and again in a little while they should see Him.[132] The place which this doctrine holds in the Christian faith is shown by the numerous references to it in the Epistles. The Apostles had not grasped the statements of Christ in such a way as to lead them to look with confidence for His return, or to gather hope of His resurrection. On the contrary, they did not expect His resurrection, and, when they heard of it, they could not believe it to be real.[133] Yet, convinced by the evidence of their own senses, they came to hold it fast as the fact that crowned all their hopes in life and death. Although the preaching of "Jesus and the Resurrection" exposed them to persecution and martyrdom, they nevertheless continued to proclaim a risen Lord. "If Christ is not risen," says Paul, "then is our preaching vain, and your faith is also vain,"[134] and he goes on to admit that if the Resurrection had not taken place, he was altogether mistaken in the view of God's character set forth in his preaching and epistles. Peter makes a similar statement: "We are begotten again unto a lively hope by the resurrection of Jesus Christ."[135] It is His victory over death that confirms the truth of His claims. He is proved to be the Son of God by His resurrection from the dead.[136] So important a fact was it regarded in connection with their work, that when they met to select a successor to Judas in the apostolic college, it was held to be essential that no one should be appointed who was not able to testify that he had seen the risen Lord.[137] Paul regarded this doctrine as so necessary, that he made it the basis of faith and salvation: "If thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved."[138]